Funding for this research was provided by:
Kementerian Riset, Teknologi dan Pendidikan Tinggi (No:135/UN126.96.36.199/PPM/KP-DRPM/2018)
Received: 22 May 2021
Accepted: 19 January 2022
First Online: 29 January 2022
: The study was approved by the Ethical Committee of the Medical Faculty Universitas Sumatera Utara/Adam Malik General Hospital No. 588/TGL/KEPK FK USU-RSUP HAM/2018. Written informed consent was obtained from each of the study participants, including from the parents and guardians of the children who were included.
: Not applicable.
: The authors declare that there are no competing interests regarding the publication of this paper.